One Night True Stand

Drug related criminal activity has been on the rise within a new app marketed for gay dating. That's when Shiraishi, a police officer in the area, decided to start investigations on his own posing as a submissive masochist. It didn't take long for Shiraishi to find a lead in his first match, a man named "K" who seems suspicious with a mask and cap to hide his identity. One thing led to the next and Shiraishi found himself in a hotel room with this guy. Not only that, but he figured out quickly enough that he's a cop! Now Shiraishi is stuck having to play along with K's sexual games so that no one finds out what he's done... but at the same time it turns out Shiraishi's actually an incredibly talented Masochist?!

(Source: MangaPlaza)